Fatal error: Uncaught Error: Call to undefined method Magento\Downloadable\Model\Product\Type::getUsedProductCollection() in /srv/public_html/app/code/Drbronner/Catalog/Block/Product/Back.php:82 Stack trace: #0 /srv/public_html/var/view_preprocessed/html/app/code/Drbronner/Catalog/view/frontend/templates/product/view/back.phtml(1): Drbronner\Catalog\Block\Product\Back->getSimpleProducts() #1 /srv/public_html/vendor/magento/framework/View/TemplateEngine/Php.php(59): include('/srv/public_htm...') #2 /srv/public_html/vendor/magento/framework/View/Element/Template.php(255): Magento\Framework\View\TemplateEngine\Php->render(Object(Drbronner\Catalog\Block\Product\Back\Interceptor), '/srv/public_htm...', Array) #3 /srv/public_html/vendor/magento/framework/View/Element/Template.php(279): Magento\Framework\View\Element\Template->fetchView('/srv/public_htm...') #4 /srv/public_html/vendor/magento/framework/View/Element/AbstractBlock.php(659): Magento\Framework\View\Element\Template->_toHtml() #5 /srv/public_html/vendor/magento/frame in /srv/public_html/app/code/Drbronner/Catalog/Block/Product/Back.php on line 82